Log-setting retardeb



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E. MCCILUSKEY LOG SETTING RETARDER Filed March 6. 1923 gwventoz Patented Aug, 12, 1924,-

UNITED STATES EDWARD MGGLUSKEY, OF CLOQ'U'ET, MINNESOTA.

LOG-SETTING RETARDER.

Application filed March 6, 1923.

To all whom it may concern:

Be it known that I, EDWARD MoCLUsKnY, a subject of the King of England, residing at Cloquet, in the county of Carlton and State of Minnesota, have invented certain new and useful Improvements in Log-Setting Retarders, of which the following is a specification, reference being had thereinto the accompanying drawing.

This invention relates to saw mill carriage attachments and has special reference to a controller for the log setting mechanism.

In modern saw mill practice a steam power setting device is frequently employed, and it is for the power control of such a device that my invention is intended, it being well known to those versed in the art of handling such a power setting mechanism that inaccuracies frequently occur by the steam setter being too quick or sudden in its action, especially in respect to the setting of a small log where comparatively little power is necessary and unintentional oversetting results.

To overcome this defect is the principal object of my present invention; however other minor objects and advantages of the peculiar construction such as simplicity and the like will become evident in the further description thereof.

Referring now to the accompanying drawing forming part of this application and in which like reference characters indicate like parts:

Figure 1 is a transverse sectional view through a saw mill carriage equipped with my device;

Figure 2 is an enlarged plan view of the retarder; and

Figure 3 is a side elevation of same.

1 represents the'bed of a common saw mill carriage having mounted thereupon the head blocks 2, carrying the reciprocal knees 3 which are controlled as is well known by the action of the set shaft 4, the cooperation between the knees and the set shaft being accomplished by a rack and pinion attachment.

The steam setting device is not shown as it forms no part of my present invention, and suffice it to say that the set shaft 4 is given intermittent rotative action by steam power, the same being controlled in any de sired manner by the setter on the carriage.

Any suitable place upon the set shaft, preferably intermediate a pair of the head Serial No. 623,093.

blocks I have mounted nonrotatably thereupon the annular friction discs 5, it preferably'being adjacent one of the cross-beams 26 of the carriage.

Cooperatively engageable with the annular friction disc 5 is the internal cone 6 having rigidly associated therewith the ratchet wheel 7 and claw hub 8, this latter assembly, comprising the'members 6, -7 a'nd'8, being loosely mounted upon the set shaft 4.

The frictionally engaged clutching or braking member, the latter being more applicable in this instance, is designed to be in constant engagement, so that it will produce a retarding or braking eifect upon the set shaft 4, however only when revolved in one direction, that is in the direction for setting purposes.

Now associated with the ratchet wheel 7 is the long gravity pawl 9, pivotally mounted as at 10 upon suitable supports rigidly fixed to the carriage frame 1. The teeth upon the ratchet wheel 7 are so shaped as to engage the pawl 9 only when the friction brake is rotated with the shaft during setting action thereof, that is to say when the shaft 4 is rotated in clockwise direction as in the mechanism herewith depicted, but when the shaft 4 is rotated backwardly at such a time when the receder of the knees is in action, the ratchet wheel will freely rotate backwardly with said shaft without engaging the pawl and the action of the brake becomes wholly released; the object ofthis free action of the device being to prevent in any way opposing the action of the receder.

As a means for governing the braking or retarding action of the device to the forward motion of the shaft 4, I provide a clutch supporting lever 11, pivoted as at 12 with the bifurcated end spanning the hub 8 of the clutch and pivotally carrying as at 13 the shoes 14 which are engaged within the circumferential annular groove 15 in the hub for reciprocally controllingsame.

The opposite end 16 of the lever 11 is carried upon the horizontally disposed bolt 17 adjustably fixed in a suitable bracket 18 on the frame of the carriage, there being an expansive helical spring 19 mounted upon the bolt 17'intermediate of the head 20 thereof and the end 16 of the lever 11. By this means it is seen that the expansive effect of the spring 19 maintains a constant inward pressure upon the cone 6 of the clutch,

cc Ofthispressure may be vatening pr loosening rfillG- nut "21 and the dear ried by jtig on thebdlt 17,tl1us providing a very convenient and delicate adjustment of'the retarding effect of the (161 .166 npomthe-i'shaft. In this manner it is evident that the shaft 4;, with its accompanying parts ispreven-ted, in its forward rotatiye action, from acquiring momentum, which is the cause of irerse t ngnandast setting vd vi SiQP? erated, the" knees Willibe advanced just; the

. exact desired amountandnoglnor'e.

'From the "foregoing it is eident that .I have produced an exceedingly simple and practical "device for accomplishing the 7 desired results, and one that will not in any Way interfere with anv of the I I -operative partsofa.sawlmill cai riage.

ng; h e r b d my nventio What I claim and desire to secure fbyLetters Patent, is:

' lxThe combination with a shaft, 5i 7a brake mounted upon the shaft, means for preventing action of the brake upon the shaft when the latter is rotated in one direction and spring controlled adjustable V meansifor regulatingthe frictional action of the brake.

2. 'A' brake for a shaft comprising two frictionally engaged members, one being EDWARD MCGLUSKEY.

Witnesses:

EDWARD S. S HEIBE, JOHN MOSWEENEY. 

